Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van dinh » van minh, van dich, va dinh
thuc van » thuc vat, thuc dan, thuc va
can thuc » dan thuc, van thuc, cay thuc
nang xa » nang x, lang xa, nang ma
sach ky » sac ky, sach y, sach kem
van can » van canh, van ban, ban can
sach ty » sach y, sach tu, sach thu
dinh di » dinh du, dinh vi, danh di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((((sach ky) OR (sach ty))) or (cac ky)) nang xa hoi. hieu van can thuc van dinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((((sach ky) OR (sach ty))) OR (cac ky)) nang xa hoi. hieu van can thuc van dinh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((((sach ky) OR (sach ty))) or (cac ky)) nang xa hoi. hieu van can thuc van dinh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu ((((sach ky) OR (sach ty))) or (cac ky)) nang xa hoi. hieu van can thuc van dinh di cuu tre*.